Dynamically configurable acknowledgement procedures

Abstract

Methods, systems, and devices for wireless communications are described. A base station and a user terminal may communicate via a relaying satellite in a non-terrestrial network. The non-terrestrial network may cause communication disruptions in hybrid automatic repeat request (HARQ) processes due to communication delays. Base stations and user terminals communicating via a satellite may implement dynamically configurable HARQ processes to avoid latency in a wireless communications system.

What is claimed is: 
     
       1. A method for wireless communication at a user terminal, comprising:
 transmitting a message indicating a first capability of the user terminal to support configuration of a configurable hybrid automatic repeat request (HARQ) process that is communicated via one or more communication links of a non-terrestrial network, the message also indicating a second capability of the user terminal to support a first maximum quantity of HARQ processes during communications via the one or more communication links of the non-terrestrial network; 
 receiving radio resource control signaling that indicates at least one HARQ process identifier corresponding to the configurable HARQ process, wherein the radio resource control signaling indicates that feedback for the configurable HARQ process corresponding to the at least one HARQ process identifier is to be disabled and indicates a second maximum quantity of HARQ processes associated with the configurable HARQ process; and 
 disabling the feedback for the configurable HARQ process based at least in part on the radio resource control signaling. 
 
     
     
       2. The method of  claim 1 , wherein the message is received via a communication link in a non-terrestrial network, and wherein determining the parameter is based at least in part on the communication link being a part of the non-terrestrial network. 
     
     
       3. The method of  claim 1 , further comprising:
 determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold. 
 
     
     
       4. The method of  claim 1 , further comprising:
 determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or negative acknowledgement satisfies a threshold, and wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold. 
 
     
     
       5. The method of  claim 1 , further comprising:
 reducing a quantity of maximum HARQ retransmissions allowed during the configurable HARQ process based at least in part on receiving the radio resource control signaling. 
 
     
     
       6. The method of  claim 1 , wherein performing the configurable HARQ process is based at least in part on modulation and coding scheme information associated with a quantity of maximum HARQ processes. 
     
     
       7. The method of  claim 1 , further comprising:
 determining to disable one or more features of the configurable HARQ process associated with one or more transport blocks. 
 
     
     
       8. The method of  claim 1 , wherein the HARQ process is disabled based at least in part on receiving the message, wherein the message includes an identified HARQ process identifier. 
     
     
       9. The method of  claim 1 , further comprising:
 flushing one or more buffers associated with the configurable HARQ process based at least in part on receiving the radio resource control signaling, wherein the radio resource control signaling comprises an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process. 
 
     
     
       10. The method of  claim 1 , wherein determining the parameter further comprises:
 determining that a HARQ transmission spans more than one slot, wherein the parameter comprises a size of the HARQ transmission. 
 
     
     
       11. The method of  claim 10 , further comprising:
 receiving one or more grouped code blocks from a transport block over multiple slots. 
 
     
     
       12. A method for wireless communication at a network device, comprising:
 receiving a message indicating a first capability of a user terminal to support configuration of a hybrid automatic repeat request (HARQ) process that is communicated via one or more communication links of a non-terrestrial network, the message also indicating a second capability of the user terminal to support a first maximum quantity of HARQ processes during communications via the one or more communication links of the non-terrestrial network; and 
 transmitting, to the user terminal, radio resource control signaling that indicates at least one HARQ process identifier corresponding to the configurable HARQ process, wherein the radio resource control signaling indicates that feedback for the configurable HARQ process corresponding to the at least one HARQ process identifier is to be disabled and indicates a second maximum quantity of HARQ processes associated with the configurable HARQ process. 
 
     
     
       13. The method of  claim 12 , further comprising:
 determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold. 
 
     
     
       14. The method of  claim 12 , further comprising:
 determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or negative acknowledgement satisfies a threshold, and wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold. 
 
     
     
       15. The method of  claim 12 , further comprising:
 determining to disable one or more features of the configurable HARQ process associated with one or more transport blocks. 
 
     
     
       16. The method of  claim 15 , wherein disabling HARQ processes is done on a per-cell basis. 
     
     
       17. The method of  claim 15 , wherein the radio resource control signaling comprises an indicator that causes the user terminal to flush one or more buffers associated with the configurable HARQ process. 
     
     
       18. The method of  claim 15 , wherein the radio resource control signaling comprises a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with the configurable HARQ process. 
     
     
       19. The method of  claim 12 , wherein determining the parameter further comprises:
 determining that a HARQ transmission spans more than one slot, wherein the parameter comprises a size of the HARQ transmission. 
 
     
     
       20. The method of  claim 19 , further comprising:
 grouping code blocks from multiple transport blocks; and 
 transmitting the grouped code blocks over multiple slots.